NASTY MEDICINE — ORC Rating

GPH

536

OSN

521

LOA

12.66 m

Displacement

6928 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7729

Medium

1.0229

High

1.1615

Triple Offshore

Low

0.9934

Medium

1.2553

High

1.4085

Boat Specifications

Dimensions

Length overall: 12.66 m
Beam: 3.79 m
Draft: 2.59 m
Displacement: 6928 kg
Crew weight: 935 kg
Wetted surface: 33.75 m²

Sails

Mainsail: 57.85 m²
Genoa: 52.7 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 182.65 m²

Design

Type: CORBY 41.5
Builder: VISON
Designer: CORBY, JOHN
Year built: 1960
Stability index: 148.9

Velocity Prediction

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into WX Navigator or compatible navigation software.

6,43,5.565023,52,6.2,60,6.57,75,6.86,90,6.77,110,6.68,120,6.52,135,5.89,143.9,5.346602,150,4.99
8,41.4,6.612354,52,7.39,60,7.65,75,7.8,90,7.76,110,7.9,120,7.83,135,7.36,145.1,6.645111,150,6.29
10,39.6,7.138099,52,7.89,60,8.08,75,8.25,90,8.23,110,8.49,120,8.46,135,8.15,149.6,7.454954,150,7.42
12,38.4,7.324292,52,8.08,60,8.31,75,8.59,90,8.64,110,8.87,120,9.1,135,8.76,150,8.12,152.3,7.985149
14,37.6,7.421528,52,8.19,60,8.45,75,8.88,90,9.07,110,9.22,120,9.59,135,9.48,149.8,8.619944,150,8.6
16,36.9,7.515462,52,8.26,60,8.54,75,9.07,90,9.47,110,9.56,120,10.04,135,10.32,147.1,9.43284,150,9.15
20,36.6,7.623152,52,8.46,60,8.75,75,9.28,90,10.04,110,10.2,120,10.93,135,12.26,142.6,11.832612,150,10.85

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	6.2	6.57	6.86	6.77	6.68	6.52	5.89	4.99
8	7.39	7.65	7.8	7.76	7.9	7.83	7.36	6.29
10	7.89	8.08	8.25	8.23	8.49	8.46	8.15	7.42
12	8.08	8.31	8.59	8.64	8.87	9.1	8.76	8.12
14	8.19	8.45	8.88	9.07	9.22	9.59	9.48	8.6
16	8.26	8.54	9.07	9.47	9.56	10.04	10.32	9.15
20	8.46	8.75	9.28	10.04	10.2	10.93	12.26	10.85

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	4.07	143.9°	4.32
8	41.4°	4.96	145.1°	5.45
10	39.6°	5.5	149.6°	6.43
12	38.4°	5.74	152.3°	7.07
14	37.6°	5.88	149.8°	7.45
16	36.9°	6.01	147.1°	7.92
20	36.6°	6.12	142.6°	9.4

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